/*
+ * Copyright (c) 2014 Advanced Micro Devices, Inc.
* Copyright (c) 2001-2005 The Regents of The University of Michigan
* All rights reserved.
*
#ifndef __PROCESS_HH__
#define __PROCESS_HH__
-//
-// The purpose of this code is to fake the loader & syscall mechanism
-// when there's no OS: thus there's no reason to use it in FULL_SYSTEM
-// mode when we do have an OS.
-//
-#include "config/full_system.hh"
-
-#if !FULL_SYSTEM
-
+#include <array>
+#include <string>
#include <vector>
+#include "arch/registers.hh"
#include "base/statistics.hh"
-#include "sim/host.hh"
+#include "base/types.hh"
+#include "config/the_isa.hh"
+#include "mem/se_translating_port_proxy.hh"
+#include "sim/fd_entry.hh"
#include "sim/sim_object.hh"
+#include "sim/syscallreturn.hh"
-class ThreadContext;
-class SyscallDesc;
class PageTable;
-class TranslatingPort;
+struct ProcessParams;
+struct LiveProcessParams;
+class SyscallDesc;
class System;
-class GDBListener;
-namespace TheISA
+class ThreadContext;
+class EmulatedDriver;
+
+template<class IntType>
+struct AuxVector
{
- class RemoteGDB;
-}
+ IntType a_type;
+ IntType a_val;
-void
-copyStringArray(std::vector<std::string> &strings, Addr array_ptr,
- Addr data_ptr, TranslatingPort* memPort, int ptr_size = sizeof(Addr));
+ AuxVector()
+ {}
+
+ AuxVector(IntType type, IntType val);
+};
class Process : public SimObject
{
/// running on.
System *system;
- // have we initialized a thread context from this process? If
- // yes, subsequent contexts are assumed to be for dynamically
- // created threads and are not initialized.
- bool initialContextLoaded;
-
// thread contexts associated with this process
- std::vector<ThreadContext *> threadContexts;
-
- // remote gdb objects
- std::vector<TheISA::RemoteGDB *> remoteGDB;
- std::vector<GDBListener *> gdbListen;
- bool breakpoint();
+ std::vector<int> contextIds;
// number of CPUs (esxec contexts, really) assigned to this process.
- unsigned int numCpus() { return threadContexts.size(); }
+ unsigned int numCpus() { return contextIds.size(); }
// record of blocked context
struct WaitRec
WaitRec(Addr chan, ThreadContext *ctx)
: waitChan(chan), waitingContext(ctx)
- { }
+ { }
};
// list of all blocked contexts
std::list<WaitRec> waitList;
- Addr brk_point; // top of the data segment
+ Addr brk_point; // top of the data segment
+
+ Addr stack_base; // stack segment base (highest address)
+ unsigned stack_size; // initial stack size
+ Addr stack_min; // lowest address accessed on the stack
- Addr stack_base; // stack segment base (highest address)
- unsigned stack_size; // initial stack size
- Addr stack_min; // lowest address accessed on the stack
+ // The maximum size allowed for the stack.
+ Addr max_stack_size;
// addr to use for next stack region (for multithreaded apps)
Addr next_thread_stack_base;
Addr nxm_start;
Addr nxm_end;
- std::string prog_fname; // file name
-
- Stats::Scalar<> num_syscalls; // number of syscalls executed
-
+ Stats::Scalar num_syscalls; // number of syscalls executed
protected:
// constructor
- Process(const std::string &nm,
- System *_system,
- int stdin_fd, // initial I/O descriptors
- int stdout_fd,
- int stderr_fd);
+ Process(ProcessParams *params);
- // post initialization startup
- virtual void startup();
+ virtual void initState();
- protected:
- /// Memory object for initialization (image loading)
- TranslatingPort *initVirtMem;
+ DrainState drain() M5_ATTR_OVERRIDE;
public:
- PageTable *pTable;
+
+ //This id is assigned by m5 and is used to keep process' tlb entries
+ //separated.
+ uint64_t M5_pid;
+
+ // flag for using architecture specific page table
+ bool useArchPT;
+ // running KvmCPU in SE mode requires special initialization
+ bool kvmInSE;
+
+ PageTableBase* pTable;
+
+ protected:
+ /// Memory proxy for initialization (image loading)
+ SETranslatingPortProxy initVirtMem;
private:
- // file descriptor remapping support
- static const int MAX_FD = 256; // max legal fd value
- int fd_map[MAX_FD+1];
+ static const int NUM_FDS = 1024;
+
+ // File descriptor remapping support.
+ std::shared_ptr<std::array<FDEntry, NUM_FDS>> fd_array;
+
+ // Standard file descriptor options for initialization and checkpoints.
+ std::map<std::string, int> imap;
+ std::map<std::string, int> oemap;
public:
- // static helper functions to generate file descriptors for constructor
- static int openInputFile(const std::string &filename);
- static int openOutputFile(const std::string &filename);
+ // inherit file descriptor map from another process (necessary for clone)
+ void inheritFdArray(Process *p);
// override of virtual SimObject method: register statistics
virtual void regStats();
- // register a thread context for this process.
- // returns tc's cpu number (index into threadContexts[])
- int registerThreadContext(ThreadContext *tc);
-
+ // After getting registered with system object, tell process which
+ // system-wide context id it is assigned.
+ void assignThreadContext(int context_id)
+ {
+ contextIds.push_back(context_id);
+ }
- void replaceThreadContext(ThreadContext *tc, int tcIndex);
+ // Find a free context to use
+ ThreadContext *findFreeContext();
- // map simulator fd sim_fd to target fd tgt_fd
- void dup_fd(int sim_fd, int tgt_fd);
+ // provide program name for debug messages
+ virtual const char *progName() const { return "<unknown>"; }
// generate new target fd for sim_fd
- int alloc_fd(int sim_fd);
+ int alloc_fd(int sim_fd, const std::string& filename, int flags, int mode,
+ bool pipe);
- // free target fd (e.g., after close)
- void free_fd(int tgt_fd);
+ // disassociate target fd with simulator fd and cleanup subsidiary fields
+ void reset_fd_entry(int tgt_fd);
// look up simulator fd for given target fd
int sim_fd(int tgt_fd);
+ // look up fd entry for a given target fd
+ FDEntry *get_fd_entry(int tgt_fd);
+
+ // look up target fd for given host fd
+ // Assumes a 1:1 mapping between target file descriptor and host file
+ // descriptor. Given the current API, this must be true given that it's
+ // not possible to map multiple target file descriptors to the same host
+ // file descriptor
+ int tgt_fd(int sim_fd);
+
+ // fix all offsets for currently open files and save them
+ void fix_file_offsets();
+
+ // find all offsets for currently open files and save them
+ void find_file_offsets();
+
+ // set the source of this read pipe for a checkpoint resume
+ void setReadPipeSource(int read_pipe_fd, int source_fd);
+
virtual void syscall(int64_t callnum, ThreadContext *tc) = 0;
- void serialize(std::ostream &os);
- void unserialize(Checkpoint *cp, const std::string §ion);
+ void allocateMem(Addr vaddr, int64_t size, bool clobber = false);
+
+ /// Attempt to fix up a fault at vaddr by allocating a page on the stack.
+ /// @return Whether the fault has been fixed.
+ bool fixupStackFault(Addr vaddr);
+
+ /**
+ * Maps a contiguous range of virtual addresses in this process's
+ * address space to a contiguous range of physical addresses.
+ * This function exists primarily to expose the map operation to
+ * python, so that configuration scripts can set up mappings in SE mode.
+ *
+ * @param vaddr The starting virtual address of the range.
+ * @param paddr The starting physical address of the range.
+ * @param size The length of the range in bytes.
+ * @param cacheable Specifies whether accesses are cacheable.
+ * @return True if the map operation was successful. (At this
+ * point in time, the map operation always succeeds.)
+ */
+ bool map(Addr vaddr, Addr paddr, int size, bool cacheable = true);
+
+ void serialize(CheckpointOut &cp) const M5_ATTR_OVERRIDE;
+ void unserialize(CheckpointIn &cp) M5_ATTR_OVERRIDE;
};
//
std::vector<std::string> envp;
std::string cwd;
- LiveProcess(const std::string &nm, ObjectFile *objFile,
- System *_system, int stdin_fd, int stdout_fd, int stderr_fd,
- std::vector<std::string> &argv,
- std::vector<std::string> &envp,
- const std::string &cwd,
- uint64_t _uid, uint64_t _euid,
- uint64_t _gid, uint64_t _egid,
- uint64_t _pid, uint64_t _ppid);
-
- virtual void argsInit(int intSize, int pageSize);
+ LiveProcess(LiveProcessParams *params, ObjectFile *objFile);
// Id of the owner of the process
uint64_t __uid;
uint64_t __pid;
uint64_t __ppid;
+ // Emulated drivers available to this process
+ std::vector<EmulatedDriver *> drivers;
+
public:
+ enum AuxiliaryVectorType {
+ M5_AT_NULL = 0,
+ M5_AT_IGNORE = 1,
+ M5_AT_EXECFD = 2,
+ M5_AT_PHDR = 3,
+ M5_AT_PHENT = 4,
+ M5_AT_PHNUM = 5,
+ M5_AT_PAGESZ = 6,
+ M5_AT_BASE = 7,
+ M5_AT_FLAGS = 8,
+ M5_AT_ENTRY = 9,
+ M5_AT_NOTELF = 10,
+ M5_AT_UID = 11,
+ M5_AT_EUID = 12,
+ M5_AT_GID = 13,
+ M5_AT_EGID = 14,
+ // The following may be specific to Linux
+ M5_AT_PLATFORM = 15,
+ M5_AT_HWCAP = 16,
+ M5_AT_CLKTCK = 17,
+
+ M5_AT_SECURE = 23,
+ M5_BASE_PLATFORM = 24,
+ M5_AT_RANDOM = 25,
+
+ M5_AT_EXECFN = 31,
+
+ M5_AT_VECTOR_SIZE = 44
+ };
+
inline uint64_t uid() {return __uid;}
inline uint64_t euid() {return __euid;}
inline uint64_t gid() {return __gid;}
inline uint64_t pid() {return __pid;}
inline uint64_t ppid() {return __ppid;}
+ // provide program name for debug messages
+ virtual const char *progName() const { return argv[0].c_str(); }
+
std::string
fullPath(const std::string &filename)
{
return full + filename;
}
+ std::string getcwd() const { return cwd; }
+
virtual void syscall(int64_t callnum, ThreadContext *tc);
- virtual SyscallDesc* getDesc(int callnum) = 0;
+ virtual TheISA::IntReg getSyscallArg(ThreadContext *tc, int &i) = 0;
+ virtual TheISA::IntReg getSyscallArg(ThreadContext *tc, int &i, int width);
+ virtual void setSyscallArg(ThreadContext *tc,
+ int i, TheISA::IntReg val) = 0;
+ virtual void setSyscallReturn(ThreadContext *tc,
+ SyscallReturn return_value) = 0;
+
+ virtual SyscallDesc *getDesc(int callnum) = 0;
+
+ /**
+ * Find an emulated device driver.
+ *
+ * @param filename Name of the device (under /dev)
+ * @return Pointer to driver object if found, else NULL
+ */
+ EmulatedDriver *findDriver(std::string filename);
// this function is used to create the LiveProcess object, since
// we can't tell which subclass of LiveProcess to use until we
// open and look at the object file.
- static LiveProcess *create(const std::string &nm,
- System *_system,
- int stdin_fd, int stdout_fd, int stderr_fd,
- std::string executable,
- std::vector<std::string> &argv,
- std::vector<std::string> &envp,
- const std::string &cwd,
- uint64_t _uid, uint64_t _euid,
- uint64_t _gid, uint64_t _egid,
- uint64_t _pid, uint64_t _ppid);
+ static LiveProcess *create(LiveProcessParams *params);
};
-#endif // !FULL_SYSTEM
-
#endif // __PROCESS_HH__
projects / gem5.git / blobdiff